Hi, I have no problem sending or receiving mail using Windows Mail through my ISP Juno. When I try to reply to a message I get the following error:
"The message could not be sent. The authentication setting might not be correct for your outgoing e-mail [SMTP] server. For help solving this problem, go to Help, search for "Troubleshoot Windows Mail", and read the "I'm having problems sending e-mail" section. If you need help determining the proper server settings, please contact your e-mail service provider.
The rejected e-mail address was 'juno.com'. Subject 'Re: Enquiry form', Account: 'hwk', Server: 'smtp.juno.com', Protocol: SMTP, Server Response: '553 Domain name required', Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC78"
Any idea how to correct this?
Thanks, Henry

The error is from the mail server not Windows Mail and the server is expecting "a fully qualified" domain name.
smtp.juno.com the full name of the server for sending (pop.juno.com for receiving).
The authenication is set in Tools | Accounts | <account name> | Properties | Servers tab There you will see the check box to set authenication and a Settings button to apply username and password.
If authenication is NOT required, uncheck this.
"Henry Krautter"

"The rejected e-mail address was 'juno.com'." That's not a valid email address. Make sure both the recipient email address and the sender email address are in proper format.
Gary VanderMolen
"Henry Krautter"

I missed that one, was thinking "account name" since we see it listed as such a lot.
"Gary VanderMolen"

Thanks, The sender email address was wrong. I don't know why it defaults to that, but correcting it worked.
"Gary VanderMolen"